Phase-referenced VLBI observations of the OH masers around U Her
1997 ◽
Vol 180
◽
pp. 373-373
Keyword(s):
We have started phase referenced monitoring of the 1667 MHz masers in the Mira variable U Her. Ultimately we hope to determine the annual parallax for this star. Three sets of VLB A observations have been performed so far. The first on July 22 1994, the second on March 6 1995 and a third on August 14 1995. Observations included bright extragalactic sources to calibrate instrumental effects and cycles of calibrator–source–calibrator (≈ 2° away) of typically 6 minutes. Without any special astrometric analysis software we detect the proper motion of U Her with an accuracy of several milli–arcseconds.
2001 ◽
Vol 205
◽
pp. 404-407
1998 ◽
Vol 164
◽
pp. 385-386
Keyword(s):
2012 ◽
Vol 8
(S287)
◽
pp. 186-187
◽
Keyword(s):
2007 ◽
Vol 3
(S242)
◽
pp. 322-323
2020 ◽
Vol 494
(2)
◽
pp. 2449-2464
◽
Keyword(s):
1980 ◽
Vol 87
◽
pp. 535-536
◽